Access a World of LTPP Data

Data from the Federal Highway Administration's (FHWA) Long-Term Pavement Performance (LTPP) program is available at your fingertips with the new Standard Data Release (SDR) 22. The SDR is in Microsoft Access® format and can be obtained at no charge as a single DVD.

The release contains the complete LTPP pavement performance database. Highlights of the new SDR
include the addition of beta tables containing data extracted from the LTPP traffic database that have been formatted for use as inputs to the Mechanistic-Empirical (M-E) Guide for the Design of New and Rehabilitated Pavement Structures. Also added were new and enhanced tables of in-situ moisture content computed parameters and updated coordinates for most of the LTPP test sections, which were measured using high-precision global positioning receivers. The SDR also includes details on changes made since previous data releases, while a tutorial on "Accessing
LTPP Data" provides step-by-step examples of working with the SDR and building queries for data extraction. An accompanying Reference Library DVD provides information on software utilities,
resource documents, and research reports that support the database.

LTPP data and products are used by State departments of transportation and others for a range of applications, including developing and enhancing pavement management systems and calibrating and validating the M-E pavement design guide.

For more information or to obtain a copy of SDR 22, contact LTPP Customer Support Services, 202-493-3035 (email: ltppinfo@fhwa.dot.gov). To learn more about the LTPP program and its many products, visit www.fhwa.dot.gov/pavement/ltpp/index.cfm.